Gas-administering apparatus.



PATENTED MAY 1, 1906.. W. N. W'AYMAN.

GAS ADMINISTERII G APPARATUS.

APPLI GATION FILED JUNK-1128,1905.

ftS

nivrrnn STATES;

earns Specification of Letters Patent.

k'atented May 1., 1908.

Application filed Tune 28, 1905. Serial No. 267, ;32

To all whom it may concern.-

Be it known tint; I, WALTER N. WAYMAN, of Staunton, vllgl is, have invented a new and useful Improvement in Gas-Administer-- ing' Apparatus, which invention is inllytset forth in the following specification.

This invention relates to gas-administering apparatus, and esoecially to means for re ducing and controlling the pressure ofgases delivered from gas-cylinders and for administeringsuch gases separately or combined in regulated proportions.

The ob ect of this invention is to provide simple means whereby an anesthetic, such as nitrous oxid or a mixture of the same and oxygen under heavy pressure, may be administered to a patient at any desired low pressure with a minimum waste of gas and to regulate the flow of gas to correspond with the res irations of the patient and to auto.- matica y sto the flow of gas by the mere withdrawal 0 the mouthpiece, and this without special manipulation of valves by the operator.

A further object is to improve the means for administering two or more gases separately or combined and regulating their proportions as desired. I

My invention further consists and resides in the construction and combination of'eooperating elements hereinafter to be more fully described and then recited in the claims.

Ccrtainmechanical expressions of the in ventive idea involved are shown in the accompanying drawings, which are designed.-

merely as illustrations to assist in the descri )tion of the invention and not as defining the imits thereof. 1 I

Figure 1 is a front elevation oi the gas-administering apparatus. Fig. 2 isa vertica? central sectional vice showing the interior construction of the es, and'Fig. 3 is adetail view. Y

Referring to Fig. 1, two gas-cylinders 1 and 2 of ordinary construction, holding under pressure gases, such as oxygen and nitrous oxid, respectively, are shown. These cylinders are provided with the usual needlevalves 3 4 and branch pipes 5 6 for connecting the cylinders up with the pressure-reducin and mixing devices 7 8. As illustrated, on ly .lZWOTGSBIVOlIS are 7 "mixin device 8; bu the number may be 111- connected with the creased b adding a reducing-valve for each ,additiona cylinderv bodiment of my pres 'r-redueing and the desired numb r the, preferred em.- gascut-oif valve, toget er with gas-inking means. The reducing-valve comprises valve and diaphragmi-supportin casing '9 having end closures 1U 11, one 0" which, 10, is provided with a tubulanmember 12 for supporting valve-adjusting means, such as a screw-threaded rod i3, which made to pa s gas-tight .arough the wall of member 12 l, means of a packing-joint l4. Casing 9 is p vided at its ends with interior screw-thrr which engage the peripheral threads on the In Fig. 2 is Blue:

end. closures 10 and 11;' To the bottom 11 of the casing is secured a T-shaped con nection 15,'within which is a partition J6, having a valve-seat 17 for receiving a valve 18, whichwhen seated closes communication between the high-pressure reservoir side and the low-pressure side communicating with the delivery end of the apparatus. The valve 18 is yieldingly supported by a hollow valvestem 19, having owe! openings 20, which permitgas to enter the valve-stein and pass upward and out at the top and also at the sides through openingsZl 22 as clearly indicated he the arrows. The valvestein is centrally yieldingly supported within the casing supports a series of rigid disks 2S, whir a terna'te with a series of rigid annular pie 24,circumfcrentiallysupporte Alternate Y above and below the disks are a series of fie. ble diaphragrns 25 26, fast at'their eentrai cum. ences to thewallof the casing. Forthe purpose of securing? preferably provide t: stem with a supper-tin -?edge 2? i" casing A ilexihl .phgrmn 26 is then a (i an am :51

paratingqings 29 are introed by a disk 23, and so ontill of diaphragms are in place. I A nut 3Q screwed downpn the valve-stem to mass the ncnts fast to the latter, and by means of it) the disks are similarly secured at their. .cumferences. A

a ring introduced above duced.

spring 31 is secured to the upper end of the valve-stem and makes a swivel connection,

with the .end of the rod 13. The spacingrings opposite the openings 21 22 are provided with corresponding openings for permitting free communication between the hollow valve-stem and alternate spaces be tween the diaphragms.

elc cents in place I plate 24 placed For the purpose of automatically cutting off the flow of low-pressure gas through conconduit 32 against the reduced gas-pressure therein. This valve is also arranged to si multaneously close the outlet of each conduit leading from each reducingvalve, and in connection therewith a manually-operated valve is employed, which enables the gas to be cut ofi from each or all the cylinders or to be mixed in any desired proportion. The means preferably employed to effect these combined objects comprises a supporting plate 34 for receiving connections 35 35, which are merely continuations of conduits 32' from the reducing-valves. Resting 011 plate 34 is a valve-plate 36, pivotally secured thereto by a bolt 37, provided with an indexhandle 38 for rotating the valve. This valve .is provided with openings 39 40 out of line with the center of the plate, as shown in Fig. 3, and positioned to alternately register in part or whole with the ends of connections Fast to plate 36 and movable with it are concentric tubes 41 42, communicating, respectively, with connections 35 35 through conduits 43 and 44, and surrounding the Whole is a casing 45, fast onplatc 34 and provided with a pipe 46 for attachment of a flexible tube 47, having suitable mouthpiece 48, provided with yielding outwardly-opening exhaling-valve 48". A spring 49 and adjusting-screw 5O permit the tension of the spring to be regulated to any pressuredesired.

The operation of the device as thus far describedis as follows: Valve 18 is raised just to clear its seat by manipu ating adj ustingscrew 13. Valve 33 is seated to close the out let-conduits 41 42, connecting with conduit 32 and 32, and the tension of spring 49 ad justed to apply the desired pressure to valve 33, which also determines in large measure the pressure at which the reducing-valve operates to open and close. Valve 36 is set, by

7 means of index-handle 38, to permit a single gas or a mixture of gases. from the gas-reservoir t fiow past valve 33. As shown, provision is made for onl y two reservoirs but it is evident that a larger number may be used without departing from the rinciple of the invention. Assuming that t e oxygen-tank alone is to be used, the valve 33 being nor mally closed, gas under heavy pressure will lift valve 18, enter the space above the valve, and through the valve-stem will distribute itself and exert a downward pressure on diaphragms 25 25 25 and through: disks 23 to the gas is substantially neutralized by the annular plates 24, and therefore practically the whole combined area of the diaphraglns resting on disks 23 is utilized in the downward pressure, and it is opposed only by the upward pressure on the small annular areas of the alternate diaphragms where they are attached to the valve-stem and side wall of the casing.

- The number of the diaphragms may be increased, thereby giving a greater difference between the highand low pressure sides of the valve and also decreasing the diameter of the casing. When it is desired to administer or Withdraw gas from the cylinders, the pressure above valve 33 is reduced, as when the patient inhales, thus resulting in a slight lowering of pressure in the casing 9, thereby unbalancing the pressure on the lower face of valve 18 and causing escape of reservoir-gas. Valve 33 will then seat when left to itself. The gas can also be delivered past valve 33 by diminishing the pressure of spring 49 on the valve, and thus be manually controlled.

It will be evident from the foregoing that a low pressure can be made to balance a very high pressure by a very simple arrangement of the diaphragms, that the escape of gas is automatically cut off after use, and that different gases can be used. separately or combined in any desired proportions and all automatically cut off when not being useda matter of obvious economy and safety.

What is claimed is 1. In gas administering apparatus, the combination of a valve-casing having a highpressure inlet open' to reservo1rressure and valvestem, rigid disks on said stem centrally supporting alternate diaphragms, annular plates fast to the casing alternating with said disks and circumferentially reinforcing alternate diaphragms, said stem being provided with openings to admit low-pressure fluid to one side of each of said centrally-so ported diaphragms, resilient means control ed outside the casing for adjusting the valve to its seat.

2. In ga's administering apparatus, the combination of a valve-casing having a highpressure inlet open to reservoir-pressure, and a low-pressure outlet, a partition separating the inlet from'the outlet and havin an opening therein, a valve seating in sai opening, and a hollow valve-stem for said valve, a plurality of resilient diaphragms sup orte by the casing and supporting saidva ve-stem, rigid disks on said stern centrally supporting phragms, said stem being provided with openings to admit low-pressure fluid to one side of each of said centrally-supported diaphragms and for closin said outlet. 4

3. In gas-a istering apparatus, a combined mixing and automatic cut-off valve, comprising a casing having a plurality of gasinlets, a sliding valve opening and closing said inlets, centrally-disposed gas-receiving tubes in said casing provided with acommon spring-pressed valve for closing outlets of same, the inlet ends of said tubes being controlled by said sliding valve, and said casing being provided with connections fordelivering said gas or gases.

4. In gas administering apparatus, the combination of a valve-casing having an inlet open to reservoir-pressure and a lowressure outlet, a pressureqeducing valve t erein controlling the passage of fluid -from said inlet to said outlet, and a low-pressure outlet-valve subject to reduced reservoir-pressure on one side and to spring-pressure on the opposite side for normal y closing said outlet.

5. In gas administering apparatus, the combination of a valve-casing having an inlet open to reservoir-pressure and a low-pressure outlet, a ressure-reducing valve in said casing control ing the passage 0 outlet, a spring-pressed outwardly-opening valve normally closing said conduit, anda fluid through the same, a conduit communicating with said casing inclosing said valve and provided with a mouthpiece ,said casing constitutin igpressure-reducing and gas-delivery cham er.

pecification in the presence of two subscribmg witnesses.

. Witnesses:

a JAS. A. GLASGOW WM. H. Asr.

In testimony whereof I have signed this ,WALTER N. WAYMA'N; i 

